Do you fit the "PERFORMANCE 25MM PLENUM SPACER Holden V6 VS-VY" as the glue describes? Or do I just put it on and tighten it back up? The glue says I need to put some on then finger tight and let dry for 1 hour ten tighten more.

In regards to using the sealant supplied in our manifold insulator, plenum spacer and intercooler kits (where applicable), we recommend sticking with the manufacturer's recommendation. In saying this though, I've torqued the above mentioned products before without waiting an hour for the sealant with success. If you do this though, you may run the risk of it not sealing properly though.